added function and comments for the datum menu
added function and comments for the datum menu


Former-commit-id: 02603eb0c079ec580ee35fb0fd2c4c25bb79c9c2
iLanguage/iLanguage,vronvali/iLanguage,iLanguage/iLanguage,iLanguage/iLanguage,cesine/iLanguage,vronvali/iLanguage,cesine/iLanguage,vronvali/iLanguage,iLanguage/iLanguage,cesine/iLanguage,vronvali/iLanguage,vronvali/iLanguage,iLanguage/iLanguage,cesine/iLanguage,cesine/iLanguage,vronvali/iLanguage